here is a video on it: http://www.youtube.com/watch?v=gfuYiNEzyVA
and here is how to install it: http://www.youtube.com/watch?v=tZnBLnYQeNE
If u don't want to watch the video on how to install it just download the mod for 1.4.7 and put the zip file in ur mods folder and voila you have the secret rooms mod
I'm Also the owner and Fire type Elite Fourof the amazing server CHARDIA!!!!!
Minecraft Username: Plumpy1337